Dressing-tool for abrading-stones.



w. J. ABRAHAM. DRESSING TOOL FOR ABRADINGSTONES. APPLIGATIOR' FILED AUG. 20, 1909.

990,027; Patehted Apr. 18, 1911.

WILLIAM J. ABRAHAM, OF CANTON, ILLINOIS, ASSIGNOR TO DAVID B. HYDE, OF

UNITED s'rarns PATENT ornron.

BEAVER, PENNSYLVANIA.

DRESSING-TOOL FOR ABRADING-STONES.

Specification of Letters Patent. Patented Apr. 18, 1911;

Applicatiou'filerl August 20, 1809. Serial No. 513,740.

To all whom it may concern:

lie it known that I, VILLIAM J. ABRAIIAAI, a citizen of the United States, residing'at Canton, in the county of Fulton and State of Illinois, have invented a certain new and use- 't'nl Improvement in Dressing-'lools for Abrading-Stones, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

My invention relates to a dressing tool. which isintendcd for use with abrading structures such as emery wheels and grind stones. I

The object ofthe invention is to provide a dresser havingthe cutters so mounted on the handle. of the dresser that the wear incident to the use of the device may be compensated. for, also to provide a structure such that the cutters may always bekept in proper position and free from wabbling when in use. p

' Generally speaking, the invention comprises the elements and combinations thereof setfforth in the accompanying claims.

'Refer'ence should be had to the accom-- panying'drawings forming part of this specification, in which v Figure 1 is the side elevation of a dressing tool embodying certain features of my invention; Fig. 2 is a top plan view of the showing in Fig. 1; Fig. 3 is a top plan view of "the dresser with the cap removed, which cap holdsthe cutter spindle, and also showing the bushings and cutters in section; Fig. 4 is a perspective view of the cap. The handle of the dresser as shown in Figs. 1 and 2 is indicated at 1. The forward part or head of the dresser is formed with two projecting arms 2 and 3 as shown in Fig. 3; These arms are provided with semi-circular bearings for the purpose ofreceiving bushings or sleeves 4 and 5. The bushings are circular, although they may be I made of any desired shape, rectangle, hexagona'l, or other. Upon the inner side, each of the bushings is provided with a flange 6 which, when in position, will lie against the inner part of the armupon the head.

In order to hold thebushings in place, I provide a cap 7 which is shown in perspective in Fig. 4. The cap is provided with projecting arms Sand 9 and the space between the arms is the same in extent as the space between the arms 2 and 5.- upon h the cutters 15.

head of the dresser. The forward parts of the arms are provided with semi-circular bearings which are adapted to engage, with the top partof the bushings to hold the same in place.

At the back portion the cap is provided with a rib 10 which will rest upon the head of the dressing tool and gives the cap a greater leverage to hold the bushings in place. Of course it will be obvious that the same effect would be obtained if a rib similar to the rib 10 were formed upon the head of the dresser at the rear portion thereof.

The cap is held in position by means of screw bolts 11 which project through suitable openings 12 in the arms and into other openings in the head of the dresser. By screwing these bolts into position the sleeves or bushings will be securely held in place and prevented from rotation or from any movement whatsoever. It will be observed thatthe handle of the dresser is provided with a notch at the forward portion thereof as indicated at 13 which'is of the same height as the thickness of the cap so that when the cap is in position the rear end thereof is flush with the upper part ofthe handle. r

The bushings or sleeves are provided with circular openings for the reception of a spindle or arbor 14 upon which are carried The openings in the bushings do not extend through the outer sidethereof but are closed except for a small oil hole 16. Furthermore, the spindle 14 is made a'little shorter than the distance between the deepest parts of the openings in the bushings when in assembled position for the purpose of permitting the bushings to move for taking up wear, as will be shortly explained. i

The cutters which are here designated may be of any desired shape or size, no invention being claimed in the same, and the cutters here shown are merely for thQPllfpose of illustration. I

' When in assembled position, the

. 10 0 flanges upon thebushings are practically in contact with the cutters so that the same will be held in a true position and the axis or spindle upon which they are mounted will be at right angles with respect to the handle of V the dresser. The cap 7 being held'securely I p ac" th re 2;" he no movement of the bushings or sleeves, can foe no wabloling or sideqenoveinent of the cutters, a

I iThe bushings are constructed any (le- S1I'(l material preferably some 'llfitilfll that will wear Well, such. White. iron or hardened steel. However when to eX- tended use the flanges upon sleeves hecome somewhat worn so tl at, there be a tendency for the cutters 15 to Wshhle, the cap 7 is loosened and the" sleeves i and 5 acljustecl towarcl each other to compensate for the Wear, thus insuring that cutters will be held in proper position.

in tools of this character the greatest Wear upon the bushings or sleeves would come, at" the rear portions thereof, clue to the pr ssure which is exerted by the opera-tor, to push the cutters into engagement with the abratiing stone that. is being dressed. in order to compensate for this unequal Wear the bushings or sleeves may he rotatec slightly by loosening cap 2 so. that Wear from this cause may also be compeniacie very cheap, 9e frequently 'rehe entire wear the same tune will he held "9 Fro-iii the foregoing description it. will be apparent that the dressing tool here described possesses the characteristic of durahilifi yet combining simplicity of structure and provides a tool wherein the Wear is brought upon such parts as may be readily adjusted to insure the proper positioning of the cutters at all times. I I Hang thus described my inventiomwhat 2. claim is:

and consequently there i formed with a head, sleeves oppositely.

inountegl in said. head and adapted to slide longitudinall' the head, means for holcli g the slee cc inzrn adjusted position, a sp'nrlle supp by the said sleeves, and cutters mounted upon the saicl spindle the saic. sleeves being: formed with the flanges upon their interior portions whiohheer against the cutters, substantially as rtec .q

ol coinprising handle 2. A dressing r sleeves mounted. in said with a he.

head, asnindle n.

ters n1o= eo upon the-said spindle, ear sleei-es' being provided With .upon tl vr portions which bear against tie cutters said. sleeves being longitudinally adjustable in the head cap secureci up l the sleeves in 3. A tool coni rising a handle hens. provide" with spaced arms each arms he? an encl circular eei'e suppo inrLe longitnriinai play in said sleeves,

cutters or r cm by the said spindle, eacl. of

, 1 A it;

Eli

the said sing provided with a flange at its in wh ch 1. nge bears against forms Wear plate, cap formed with spaced arms, a groove in each arm of the cap the groove portion or" each armcngaging with a sleeve means for h0lcling the said cap in place. r In. testimony whereof, I hereunto my signature in the presence of two Witnesses.

I WILLIAM J. ABRAHAM. Vilitnesses: 

